Have you checked out UPrinting.com yet?

Online Printing Company

Why UPrinting.com isn't your average printing company:

Blog Sponsorships:
If you are looking to find a sponsor for your blog, UPrinting.com is definitely interested. We offer giveaways, advertising and more for qualified bloggers.

Non-Profit Sponsorships:
The U-Community Program sponsors hundreds of non-profits and education to improve our local communities.

Social Justice Projects:
The UPrinting Kiva account promotes small business growth in developing countries.

Green Printing:
UPrinting supports a sustainable future by recycling, using non-toxic inks, and offering eco-friendly recycled paper stocks for business cards and postcard printing.

I am currently a sponsored blog of UPrinting. Having them as a sponsor is wonderful. If you are looking for a great company to sponsor your blog site this is a company I highly recommend.